src/msw/dir.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/dir.cpp
   3 // Purpose:     wxDir implementation for Win32
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     08.12.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/intl.h"
  29     #include "wx/log.h"
  30 #endif // PCH
  31
  32 #include "wx/dir.h"
  33 #include "wx/filefn.h"          // for wxDirExists()
  34
  35 #ifdef __WINDOWS__
  36     #include "wx/msw/private.h"
  37 #endif
  38
  39 // ----------------------------------------------------------------------------
  40 // define the types and functions used for file searching
  41 // ----------------------------------------------------------------------------
  42
  43 namespace
  44 {
  45
  46 typedef WIN32_FIND_DATA FIND_STRUCT;
  47 typedef HANDLE FIND_DATA;
  48 typedef DWORD FIND_ATTR;
  49
  50 inline FIND_DATA InitFindData()
  51 {
  52     return INVALID_HANDLE_VALUE;
  53 }
  54
  55 inline bool IsFindDataOk(FIND_DATA fd)
  56 {
  57         return fd != INVALID_HANDLE_VALUE;
  58 }
  59
  60 inline void FreeFindData(FIND_DATA fd)
  61 {
  62     if ( !::FindClose(fd) )
  63     {
  64         wxLogLastError(_T("FindClose"));
  65     }
  66 }
  67
  68 inline FIND_DATA FindFirst(const wxString& spec,
  69                            FIND_STRUCT *finddata)
  70 {
  71     return ::FindFirstFile(spec.fn_str(), finddata);
  72 }
  73
  74 inline bool FindNext(FIND_DATA fd, FIND_STRUCT *finddata)
  75 {
  76     return ::FindNextFile(fd, finddata) != 0;
  77 }
  78
  79 const wxChar *GetNameFromFindData(FIND_STRUCT *finddata)
  80 {
  81     return finddata->cFileName;
  82 }
  83
  84 inline FIND_ATTR GetAttrFromFindData(FIND_STRUCT *finddata)
  85 {
  86     return finddata->dwFileAttributes;
  87 }
  88
  89 inline bool IsDir(FIND_ATTR attr)
  90 {
  91     return (attr & FILE_ATTRIBUTE_DIRECTORY) != 0;
  92 }
  93
  94 inline bool IsHidden(FIND_ATTR attr)
  95 {
  96     return (attr & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)) != 0;
  97 }
  98
  99 } // anonymous namespace
 100
 101 // ----------------------------------------------------------------------------
 102 // constants
 103 // ----------------------------------------------------------------------------
 104
 105 #ifndef MAX_PATH
 106     #define MAX_PATH 260        // from VC++ headers
 107 #endif
 108
 109 // ----------------------------------------------------------------------------
 110 // macros
 111 // ----------------------------------------------------------------------------
 112
 113 #define M_DIR       ((wxDirData *)m_data)
 114
 115 // ----------------------------------------------------------------------------
 116 // private classes
 117 // ----------------------------------------------------------------------------
 118
 119 // this class stores everything we need to enumerate the files
 120 class wxDirData
 121 {
 122 public:
 123     wxDirData(const wxString& dirname);
 124     ~wxDirData();
 125
 126     void SetFileSpec(const wxString& filespec) { m_filespec = filespec; }
 127     void SetFlags(int flags) { m_flags = flags; }
 128
 129     void Close();
 130     void Rewind();
 131     bool Read(wxString *filename);
 132
 133     const wxString& GetName() const { return m_dirname; }
 134
 135 private:
 136     FIND_DATA m_finddata;
 137
 138     wxString m_dirname;
 139     wxString m_filespec;
 140
 141     int      m_flags;
 142
 143     wxDECLARE_NO_COPY_CLASS(wxDirData);
 144 };
 145
 146 // ============================================================================
 147 // implementation
 148 // ============================================================================
 149
 150 // ----------------------------------------------------------------------------
 151 // wxDirData
 152 // ----------------------------------------------------------------------------
 153
 154 wxDirData::wxDirData(const wxString& dirname)
 155          : m_dirname(dirname)
 156 {
 157     m_finddata = InitFindData();
 158 }
 159
 160 wxDirData::~wxDirData()
 161 {
 162     Close();
 163 }
 164
 165 void wxDirData::Close()
 166 {
 167     if ( IsFindDataOk(m_finddata) )
 168     {
 169         FreeFindData(m_finddata);
 170
 171         m_finddata = InitFindData();
 172     }
 173 }
 174
 175 void wxDirData::Rewind()
 176 {
 177     Close();
 178 }
 179
 180 bool wxDirData::Read(wxString *filename)
 181 {
 182     bool first = false;
 183
 184     WIN32_FIND_DATA finddata;
 185     #define PTR_TO_FINDDATA (&finddata)
 186
 187     if ( !IsFindDataOk(m_finddata) )
 188     {
 189         // open first
 190         wxString filespec = m_dirname;
 191         if ( !wxEndsWithPathSeparator(filespec) )
 192         {
 193             filespec += _T('\\');
 194         }
 195         if ( !m_filespec )
 196             filespec += _T("*.*");
 197         else
 198             filespec += m_filespec;
 199
 200         m_finddata = FindFirst(filespec, PTR_TO_FINDDATA);
 201
 202         first = true;
 203     }
 204
 205     if ( !IsFindDataOk(m_finddata) )
 206     {
 207 #ifdef __WIN32__
 208         DWORD err = ::GetLastError();
 209
 210         if ( err != ERROR_FILE_NOT_FOUND && err != ERROR_NO_MORE_FILES )
 211         {
 212             wxLogSysError(err, _("Can not enumerate files in directory '%s'"),
 213                           m_dirname.c_str());
 214         }
 215 #endif // __WIN32__
 216         //else: not an error, just no (such) files
 217
 218         return false;
 219     }
 220
 221     const wxChar *name;
 222     FIND_ATTR attr;
 223
 224     for ( ;; )
 225     {
 226         if ( first )
 227         {
 228             first = false;
 229         }
 230         else
 231         {
 232             if ( !FindNext(m_finddata, PTR_TO_FINDDATA) )
 233             {
 234 #ifdef __WIN32__
 235                 DWORD err = ::GetLastError();
 236
 237                 if ( err != ERROR_NO_MORE_FILES )
 238                 {
 239                     wxLogLastError(_T("FindNext"));
 240                 }
 241 #endif // __WIN32__
 242                 //else: not an error, just no more (such) files
 243
 244                 return false;
 245             }
 246         }
 247
 248         name = GetNameFromFindData(PTR_TO_FINDDATA);
 249         attr = GetAttrFromFindData(PTR_TO_FINDDATA);
 250
 251         // don't return "." and ".." unless asked for
 252         if ( name[0] == _T('.') &&
 253              ((name[1] == _T('.') && name[2] == _T('\0')) ||
 254               (name[1] == _T('\0'))) )
 255         {
 256             if ( !(m_flags & wxDIR_DOTDOT) )
 257                 continue;
 258         }
 259
 260         // check the type now
 261         if ( !(m_flags & wxDIR_FILES) && !IsDir(attr) )
 262         {
 263             // it's a file, but we don't want them
 264             continue;
 265         }
 266         else if ( !(m_flags & wxDIR_DIRS) && IsDir(attr) )
 267         {
 268             // it's a dir, and we don't want it
 269             continue;
 270         }
 271
 272         // finally, check whether it's a hidden file
 273         if ( !(m_flags & wxDIR_HIDDEN) )
 274         {
 275             if ( IsHidden(attr) )
 276             {
 277                 // it's a hidden file, skip it
 278                 continue;
 279             }
 280         }
 281
 282         *filename = name;
 283
 284         break;
 285     }
 286
 287     return true;
 288 }
 289
 290 // ----------------------------------------------------------------------------
 291 // wxDir helpers
 292 // ----------------------------------------------------------------------------
 293
 294 /* static */
 295 bool wxDir::Exists(const wxString& dir)
 296 {
 297     return wxDirExists(dir);
 298 }
 299
 300 // ----------------------------------------------------------------------------
 301 // wxDir construction/destruction
 302 // ----------------------------------------------------------------------------
 303
 304 wxDir::wxDir(const wxString& dirname)
 305 {
 306     m_data = NULL;
 307
 308     (void)Open(dirname);
 309 }
 310
 311 bool wxDir::Open(const wxString& dirname)
 312 {
 313     delete M_DIR;
 314
 315     // The Unix code does a similar test
 316     if (wxDirExists(dirname))
 317     {
 318         m_data = new wxDirData(dirname);
 319
 320         return true;
 321     }
 322     else
 323     {
 324         m_data = NULL;
 325
 326         return false;
 327     }
 328 }
 329
 330 bool wxDir::IsOpened() const
 331 {
 332     return m_data != NULL;
 333 }
 334
 335 wxString wxDir::GetName() const
 336 {
 337     wxString name;
 338     if ( m_data )
 339     {
 340         name = M_DIR->GetName();
 341         if ( !name.empty() )
 342         {
 343             // bring to canonical Windows form
 344             name.Replace(_T("/"), _T("\\"));
 345
 346             if ( name.Last() == _T('\\') )
 347             {
 348                 // chop off the last (back)slash
 349                 name.Truncate(name.length() - 1);
 350             }
 351         }
 352     }
 353
 354     return name;
 355 }
 356
 357 wxDir::~wxDir()
 358 {
 359     delete M_DIR;
 360 }
 361
 362 // ----------------------------------------------------------------------------
 363 // wxDir enumerating
 364 // ----------------------------------------------------------------------------
 365
 366 bool wxDir::GetFirst(wxString *filename,
 367                      const wxString& filespec,
 368                      int flags) const
 369 {
 370     wxCHECK_MSG( IsOpened(), false, _T("must wxDir::Open() first") );
 371
 372     M_DIR->Rewind();
 373
 374     M_DIR->SetFileSpec(filespec);
 375     M_DIR->SetFlags(flags);
 376
 377     return GetNext(filename);
 378 }
 379
 380 bool wxDir::GetNext(wxString *filename) const
 381 {
 382     wxCHECK_MSG( IsOpened(), false, _T("must wxDir::Open() first") );
 383
 384     wxCHECK_MSG( filename, false, _T("bad pointer in wxDir::GetNext()") );
 385
 386     return M_DIR->Read(filename);
 387 }
 388
 389 // ----------------------------------------------------------------------------
 390 // wxGetDirectoryTimes: used by wxFileName::GetTimes()
 391 // ----------------------------------------------------------------------------
 392
 393 #ifdef __WIN32__
 394
 395 extern bool
 396 wxGetDirectoryTimes(const wxString& dirname,
 397                     FILETIME *ftAccess, FILETIME *ftCreate, FILETIME *ftMod)
 398 {
 399 #ifdef __WXWINCE__
 400     // FindFirst() is going to fail
 401     wxASSERT_MSG( !dirname.empty(),
 402                   _T("incorrect directory name format in wxGetDirectoryTimes") );
 403 #else
 404     // FindFirst() is going to fail
 405     wxASSERT_MSG( !dirname.empty() && dirname.Last() != _T('\\'),
 406                   _T("incorrect directory name format in wxGetDirectoryTimes") );
 407 #endif
 408
 409     FIND_STRUCT fs;
 410     FIND_DATA fd = FindFirst(dirname, &fs);
 411     if ( !IsFindDataOk(fd) )
 412     {
 413         return false;
 414     }
 415
 416     *ftAccess = fs.ftLastAccessTime;
 417     *ftCreate = fs.ftCreationTime;
 418     *ftMod = fs.ftLastWriteTime;
 419
 420     FindClose(fd);
 421
 422     return true;
 423 }
 424
 425 #endif // __WIN32__
 426